Megasporophyll

Angiosperms|Microsporophyll - Stamen|Microsporogenesis |Male Gametophyte - Pollen Grain|Megasporophyll - Pistil / Carpel|Megasporangia|Female Gametophyte - Embryo Sac|Pollination And Pollen Pistil Interaction|Double Fertilisation|Life Cycle|Post Fertilisation Changes|Classification Of Angiosperms|Monocots And Dicots|Economic Importance

Read the following statements : a. The male or female cones or strobili may be borne on same tree in Pinus b. In Cycas, male cones and megasporophylls are borne on different tress. c. Stem of Cycas is branched and of Pinus and Cedrus is unbranched d. In gymnosperms, generally tap roots are found Select the correct statements :

Assertion : An angiospermous flower represents the modified condensed shoot which performs the function of sexual reproduction. Reason : The fertile leaves of the shoot become modified into microsporophylls and megasporophylls which bear ovules and anthers respectively.

Read the given statements and selet the incorrect ones. (i). Sporophyte in mosses is more elaborate than that in liverworts. (ii). Salvinia is homosporous (iii). Life-cycle in all spermatophytes is diplontic. (iv). In cycas, male cones and megasporophylls are borne on the same trees.

Fill in the blanks (A) The plant body in bryophytes represents the ……………. Phase and bears haploid………………..in the gametangia. (B) Some red algae secrete and deposit ………and appear like corals. (C ) The angiosperms, unlike gymnosperms, have a highly developed vascular tissue system with ...........in the xylem and ..............cells in the phloem. (D) Class gymnospermae has been placed between the ............and ...............in Bentham and Hooker's system of classification of flowering plants. (E) In Cycas, the megasporophylls are not organised in definite ............. .